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New Horizons (U.S.)
Image of Pluto sent back by New Horizons. Source: NASA Destination: Pluto-Kuiper Belt. Launched: Jan. 19, 2006. Arrival: Summer 2015. Mission: To study the worlds at the edge of our solar…Horizon League
ConferenceOverallTeamWLPctWLPct†Butler124.750266.812†Detroit115.6881813.581WI-Milwaukee115.6881613.552Wright St97.5621711.607Loyola-IL97.5671713.567*Illinois-Chicago88.5002014.588Cleveland…horizon
(Encyclopedia) horizon, in astronomy, roughly circular line bounding an observer's view of the surface of the earth where the sky and earth seem to meet. This is the visible horizon. At sea the…twilight
(Encyclopedia) twilight, period between sunset and total darkness or between total darkness and sunrise. Total darkness does not occur immediately when the sun sinks below the horizon because light…altazimuth coordinate system
(Encyclopedia) altazimuth coordinate systemaltazimuth coordinate systemăltăzˈəməth [key] or horizon coordinate system, astronomical coordinate system in which the position of a body on the celestial…celestial horizon
(Encyclopedia) celestial horizon, one axis of the altazimuth coordinate system. It is the great circle on the celestial sphere midway between the observer's zenith and nadir; it divides the celestial…sextant
(Encyclopedia) CE5 Sextant sextant, instrument for measuring the altitude of the sun or another celestial body; such measurements can then be used to determine the observer's geographical…circumpolar star
(Encyclopedia) circumpolar star, star whose diurnal circle lies completely above or completely below an observer's horizon. A star whose diurnal circle lies above the horizon never sets, even though…Home, Sweet Home
The home fields, home courts and home ice of the AL, NL, NBA, NFL, CFL, NHL, WNBA, NCAA Division I-A college football and Division I basketball. Also included are MLS stadiums, Formula One,…zenith
(Encyclopedia) zenith, in astronomy, the point in the sky directly overhead; more precisely, it is the point at which the celestial sphere is intersected by an upward extension of a plumb line from…Trending
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